This may help someone when upgrading from Beta 5.0.23 to 5.0.24. Most of the installs went fine on my XP pro network, but 4 of the 9 computers didn't want to run AC or run the Data Tuner on the main computer until I first removed the Amazing Charts Beta 5, and only then could I do a clean install of the 5.0.24. This happened also when I did the 5.0.24 install from the previous Beta 5 version. Hope this helps.